Cowbell Deficiency, also known as CBD, is an extreme medical condition. Victims of CBD are known to have high fever. The only known prescription of CBD is more cowbell.

Talk to your doctor if think you are suffering from CBD.

Intern to Doctor

I: "Doctor we have a new patient"
D: "What does he have"
I: "The only visible symptom this man has a fever, but it looks like he is dying."
D: "<softly>Cowbell Deficiency"
I: "What?"
D: "This man...has a fever...and the only prescription...is more cowbell."

The person who has seen every single episode of the hit TV show LOST sometimes can't even describe what is happening on the show to a person who never watches it. This is usually because they do not understand everything that has happened, even though they are experts.

A: "So let me get this right...You've seen all 4 seasons and you can tell me what happening."